Hoisting structure for ground working implements



June 20, 1933. s MlLLER AL 1,914,521

HOISTING STRUCTURE FOR GROUND WORKING IMPLEMENTS Original Filed May 17,1932 3 Sheets-Sheet INVENTORS- ISML'ZZQ LookL.(l2ong "a? S2 MAITORNEY gUSamL. 6'];

ciaeL. 72012 June 20, 1933- T. s. MILLER ET AL HOISTING STRUCTURE FORGROUND WORKING IMPLEMENTS Original Filed May 17, 1932 5 Sheets-Sheet 2017g .6770] V W ATTORN Y Sam L BY Q g Q June 20, 1933.

HOISTING STRUCTURE FOR GROUND WORKING IMPLEMENTS Original Filed May 17,1932 3 Sheets-Sheet 3 INVENTORS TSMiLZer Look L C1701? c/LLeL. (7201338am L. Chang Q 5 Q g ATTORNEY T. s. MILLER ET AL 1,914,521

Patented June 20, 1933 PATENT @FFIQE TONY S. MILLER, LOOK L. CHONG, JUEL. CHUNG, AND SAM L. CHONG, OF ISLETON, CALIFORNIA HOISTING Originalapplication filed May 1'7, 1932,

This invention relates to agricultural mplements of that generrlcharacter in which the implement is pivotally mounted on the tractor andis arranged to be raised or lowin ered when necessary by a hoistingmechanism sired without relying on the power or operaa it ' tractor 1 ispreferably ly at 4 and is tion of the tractor. We have also arranged asimple but efiective form of hand hoisting means which may be used whenthe tractor is not operating, or in other emergencies.

These objects we accomplish by means of such structure and relativearrangement of parts as will fully appear by a perusal of the followingspecification and claims.

In the drawings similar characters of reference indicate correspondingparts in the several views:

Fig. 1 is a side elevation of the complete apparatus as in operation.

1., Fig. 2 1s a fragmentary transverse eleva tion of the framesupporting and hoisting structure.

Figs. 8 and 4 are diagrammatic side views showing the double operationof the hoist control lever.

Fig. 5 is a plan view of the manually operated hoist mechanism withcertain parts in section.

Referring now more particularly to the characters of reference on thedrawings, the of the endless track type having a large cast housing 2between the tracks and which terminates at its rear end in a gear boz: 3as usual.

The rotary implement is indicated generalmounted on a frame 5 which ispivoted at its forward end in axial connection with the drive shaft 6from which the implement-is driven and which is itself driven fromthe-shaft 6a pro ecting laterally from the gear box 3. j

STRUCTURE FOB, GROUND VJOBKING IMPLEMENTS Serial No. 611,840. Dividedand this application filed October 7,

Serial No. 686,638.

The shaft 6 is supported in bearing blocks 7 mounted in connection witha heavy bracket plate or frame 8 secured to the under side of thehousing 2. The rotary digging unit is normally supported at a certainlevel relative to the ground by side rollers 9 and may be raised so asto be entirely clear of the ground by the following means.

Secured to and upstanding from the rear vertical flanges 8a of thebracket plate are transversely converging derrick arms 10 between whichadjacent their upper ends a sheave block 11 of a block and tackle issupported. The arms are braced against rearward movement by bars 12extending from the top of the arms to connections with the plate 8adjacent its forward corners. The other block 13 of the tackle has ahook l t to detachably engage an eye 15 formed on top of the rear crossmember 16 of the frame 5 or a chain link 17 or the like on the hood 18of the digging unit adjacent its rear end. A cable 19 passes about thesheaves of the block and tackle in the usual manner and then down to andabout a. drum 20. This drum is secured on a shaft 21 supported from thearms 10 in a horizontal plane substantially midway between the uppersheave block 11 and the shaft 6. A hydraulic brake unit 22 of standardcharacter is mounted on one end of the shaft 21. A belt pulley 23 ismounted on the shaft 73 and another cooperating pulley 24K is on theshaft 6, with a normally slack belt 25 therebetween.

If the belt is tightened against the pulley therefore while the shaft 6is driven the shaft 21 will be rotated and the digging unit raised. Ifthe belt is then allowed to run slack the unit will drop of its ownweight. The raising of the unit and the subsequent lowering of the sameat a controlled speed is controlled by the operator of the tractor inthe following manner.

Pivoted intermediate its ends on the tractor in a position convenient tothe operator is a vertical lever 26. A flexible element 27 6X tendsrearwardly from the lower end of this lever and is connected to theoperating arm 28 of the fluid control mechanism 29 of the hydraulicbrake unit 22. This mechanism is of standard character as is the brakeitself, and the arm 28 is arranged so that when pulled in one directionthe fluid is fed to the brake unit and the brake is applied. 7

Projecting forwardly from the lower end of the lever and then about afixed direction changing pulley 20 is another flexible element 31. Thiselement at its rear end 1s applied to an arm 32 depending from atransverse shaft 33 suitably journaled from one of the arms 10 and thebox 3 back of the belt 25. An idler roller 34 to engage the belt issupported between arms 35 depending from said shaft 33. Therefore, whensaid element 31 is pulled the idler will be advanced against the belt toplace the same under tension and in driving relation with the pulleys 24and 25. hen the lever 26 is pushed forwardly as in Fig. 4 therefore saidelement 31 'is actuated to cause the drum shaft 21 to be driven and theunit raised, while the brake is released. Said idler pulley and beltarrangement is therefore practically a form of clutch. Disengaging theusual control clutch of the shaft 6a then enables the unit to be heldraised as the lever is retained in its forward position and the beltclamped agamst the pulleys.

hen the lever is pushed back, whether the shaft 6a is driven or not, theidler will be released but the brake will be applied, with a forcecorresponding to the extent to which the lever is thus moved, and soallowing the unit to be lowered to its normal position gently andeasily.

It may at times be desirable to raise the unit when the engine is notrunning so we provide an emergency hand operated means for rotating theshaft 21, as shown in Fig. 5. This means comprises a gear 36 fixed onthe shaft 21 adjacent one of the end bearings 37 thereof, said bearingsbeing secured against the forward face of the derrick arms 10. This gearengages a pinion 38 fixed on a hand shaft 39 provided at its outer endwith a removable crank handle 40. The shaft 39 is slidably supported inthe ends of a housing 41 in which the pinion is enclosed and which isclamped against the rear face of the adjacent arm 10, the gearprojecting into the housing for engagement with the pinion. The lengthof the housing is suflicient to enable the pinion to be slid clear ofthe same by longitudinal movement of the shaft 39. It is normally heldeither in its engaged or disengaged position by spring pressed elements42 mounted in the housing adjacent its ends to alternately en gagecircumferential grooves 43 in the shaft, 0 said grooves being thosealways concealed between the ends of the housing and being thus freefrom exposure to the clogging action of dirt from the outside. Normallythe pinion is retracted from the gear so that when the hoistis operatedby power the pinion and han- To brace the derrick arms agains possibledeflection in the plane of the shaft 21 brace bars 44 extend from thearms 10 adjacent the bearings 37 to brackets 45 mounted in connectionwith the housing 2 to the sides of the same.

If it is desired to raise the hood for the inspection of the cuttingunit without raising the latter from the ground the hook 14 may bedisengaged from the eye 15 and applied to the l nk or eye 17. Theoperation of the hoisting mechanism then raises the hood about itsforward pivotal connection 46 with the frame 5 as shown in dotted linesin Fig. 1.

From the foregoing description it will be readily seen that we haveproduced such a device as substantially fulfills the objects of theinvention as set forth herein.

lVhile this specification sets forth in detall the present and preferredconstruction of the device, still in practice such deviations from suchdetail may be resorted to as do not form a departure from the spirit ofthe invention, as defined by the appended claims.

aving thus described our invention what we claim as new and useful anddesire to secure by Letters Patent is:

1. In an agricultural implement, a portin member, a digger supportingpivoted on and said member,a

supframe pro ecting rearwardly from hoist structure for raising saidframe and including a cable drum: a shaft on which said drum is mounted,disengageable drive means for turning the shaft control means to placesaid drive means in or out of operation, abrake structure associatedwith the shaft, a single pivoted lever, and connections between saidlever and the control means and brake structure arranged so that amovement of the lever in one direction will cause the shaft to be drivenand the brake released, and vice versa.

2. In an agricultural implement, a supporting member, a diggersupporting frame pivoted on and projecting rearwardlv from said member,a hoist structure for raising said frame and including a cable drum; ashaft on which said drum is mounted, disengageable drive means forturning the shaft, control means to place said drive means in or out ofoperation, and including a pivoted arm; a brake structure associatedwith the shaft, control means for the structure including a pivoted arm,a single pivoted lever mounted ahead of both arms, a flexible elementbetween said lever and the brake control arm, whereby said arm will bepulled by the movement of the lever in one direction only, a flexibleelement extending forwardly from the lever and then back to the drivecontrol arm, and a direction changing member about which said last namedele ment passes ahead of the lever whereby said last named arm will onlybe pulled when the lever is moved in the opposite direction; both saidcontrol means being normally idle.

3. In an agricultural implement, a supporting member, a diggersupporting frame pivotedpn and projecting rearwardly from said member, ahoist structure for raising said frame and including a cable drum; ashaft on which said drum is mounted, power means for rotating saidshaft, a gear on said shaft, a pinion to engage said gear, a hand shaftconnected to the pinion, and means support- 1 ing said hand shaft forlongitudinal sliding movement whereby to move said pinion in or out ofmesh with the gear.

4. In an agricultural implement, a supporting member, adigger-supporting frame pivoted on and projecting rearwardly from saidmember, a hoist derrick rigid with and projecting upwardly from saidmember, a driven transverse shaft mounted in connec tion with saidmember, another transverse shaft mounted on the derrick in spacedrelation to the driven shaft, a cable drum on said other shaft, a blockand tackle unit for engagement With the digger frame supported from theupper end of thederrick and including a cable wound about the drum,pulleys on the shafts, a normally loose belt between the pulleys, anidler engaging the belt, a brake structure applied to the drum shaft,and a common means operable at will to force the idler against the beltto take up the slack and to apply the brake, alternately andselectively.

5. In an agricultural implement, a support ing member, a frame pivotedon and projecting rearwardly from said member for raising and loweringmovement, a pair of shafts mounted in connection with said member, oneof the shafts being driven; a hoist structure for said frame including acable drum on the 49 other shaft, pulleys on the shafts, a normallyloose belt about the pulleys, an idler engaging the belt, a brakestructure applied to the drum shaft, and a common means operable at willto force the idler against the belt and to apply the brake, alternatelyand selectively.

6. In an agricultural implement, a supporting member, a frame pivoted onand proj ecting roarwardly from said member for raising and loweringmovement, a pair of shafts 50 mounted in connection with said member,one of the shafts being driven; a hoist structure for said frameincluding a cable drum on the other shaft, pulleys on the shafts, anormally loose belt about the pulleys, an idler engaging the belt, handmeans operable at will and applied to the idler to force the sameagainst the belt, and brake means operable at will to control therotation of the drum shaft when the idler is slack.

In testimony whereof we aflix our signatures.

TONY S. MILLER. LOOK L. OHONG. JUE L. CHONG. SAM L. CHUNG.

